The Hindu-Arabic Numerals c12.104

c12.104

For the sake of further comparison, three illustrations from works in Mr. Plimpton's library, reproduced from the *Rara Arithmetica*, may be considered. The first is from a Latin manuscript on arithmetic,¹ of which the original was written at Paris in 1424 by Rollandus, a Portuguese physician, who prepared the work at the command of John of Lancaster, Duke of Bedford, at one time Protector of England and Regent of France, to whom the work is dedicated. The figures show the successive powers of 2. The second illustration is from Luca da Firenze's *Inprencipio darte dabacho*,² c. 1475, and the third is from an anonymous manuscript³ of about 1500.